What Is Kelp? How Beneficial Is It for Health?

In an era where people are becoming more interested in natural foods and marine-based nutrients, Kelp has become one ingredient gaining more attention, especially among those looking for natural sources of minerals.

Kelp is a type of brown seaweed, or Brown Algae, that grows in cold ocean waters, such as:

• The Pacific coast.
• Northern seas.
• Areas with mineral-rich seawater.

Kelp contains notable nutrients, including:

• Iodine.
• Various minerals.
• Fiber.
• Antioxidants such as polyphenols and fucoidan.

For this reason, Kelp is used in both food and dietary supplements.

1. Kelp Stands Out as a Natural Source of Iodine 

One nutrient that makes Kelp different from general plants is iodine.

Iodine is an important mineral that the body uses to produce thyroid hormones, including:

• Thyroxine, or T4.
• Triiodothyronine, or T3.

These hormones are involved in:

• Regulating energy metabolism.
• Regulating body temperature.
• Supporting the function of various systems in the body.

If iodine intake is insufficient, the body may produce fewer thyroid hormones.

Research published in Nature Reviews Endocrinology in 2017 reported that iodine is an essential nutrient for thyroid hormone production and metabolic function.

2. Supports Thyroid Function 

The thyroid gland acts like the body’s “energy system regulator.”

When the body receives enough iodine, it can produce thyroid hormones normally.

Groups that may benefit from paying attention to iodine intake include:

• People who eat little seafood.
• People who avoid iodized salt.
• People who follow certain restricted diets.

However, getting too much iodine may also affect thyroid function. Therefore, Kelp should be consumed in an appropriate amount.

3. Contains Fiber That Supports Gut Health 

Although Kelp is not a staple food, this seaweed contains different types of fiber, such as:

• Alginate.
• Polysaccharides.

These act as dietary fibers that help support the digestive system.

Benefits of fiber include:

• Helping increase fullness.
• Supporting bowel movements.
• Serving as food for gut microorganisms.

Research published in Marine Drugs in 2017 found that polysaccharides from seaweed have potential to support gut health and provide several bioactive properties.

4. Contains Natural Antioxidants 

Kelp contains bioactive compounds such as:

• Fucoidan.
• Phlorotannins.
• Polyphenols.

These compounds have been studied for properties such as:

• Antioxidant effects.
• Anti-inflammatory effects.

They are related to protecting cells from damage caused by free radicals.

Research published in Marine Drugs in 2019 reported that compounds from brown seaweed, such as fucoidan, have interesting biological activities, especially antioxidant effects and regulation of inflammatory processes.

5. Kelp, Heart Health, and Lipid Management 

Seaweed contains nutrients that may help support heart health, such as:

• Fiber.
• Polysaccharides.
• Minerals.

Some research suggests that compounds from seaweed may affect:

• Fat absorption.
• Cholesterol levels.
• Metabolic balance.

However, more human studies are still needed to confirm long-term effects.

6. Who Is Kelp Suitable For? 

Kelp may be suitable for people who want to increase natural nutrient intake, such as:

• People who eat little seafood.
• People interested in Plant-Based Nutrition.
• People who take a holistic approach to health.

7. Who Should Be Careful with Kelp? 

Although Kelp has benefits, it is not suitable for everyone in high amounts.

Groups that should be cautious include:

• People with thyroid disorders.
• People taking certain thyroid-related medications.
• People who already receive high amounts of iodine from their diet.

This is because excessive iodine may disturb thyroid hormone balance.

How Is Kelp Different from Spirulina? 

Many people may confuse Kelp with Spirulina because both are marine-related foods.

However, they have different strengths.

Kelp

Stands out for iodine.

Is a brown seaweed.

Focuses on minerals and marine bioactive compounds.

Spirulina

Stands out for protein.

Contains Phycocyanin.

Is a blue-green cyanobacteria.

Therefore, the two have different roles and do not directly replace each other.

Summary 

Kelp is a brown seaweed known for:

• Iodine for thyroid hormone production.
• Natural minerals.
• Fiber for gut health.
• Marine-derived antioxidants.

However, Kelp is not a necessary supplement for everyone. Its use should depend on dietary habits, health condition, and individual nutrient needs.

For people who eat little seafood or are interested in Natural Nutrition, supplementing with Kelp in an appropriate amount may be another interesting option.

References 

• Zimmermann MB, Boelaert K. “Iodine deficiency and thyroid disorders.” The Lancet Diabetes & Endocrinology, 2015.

• Pearce EN. “Iodine nutrition: iodine content of foods and dietary requirements.” Thyroid Research, 2017.

• Brown EM, et al. “Seaweed and human health.” Marine Drugs, 2014.

• Fitton JH. “Therapeutic potential of fucoidan: a review.” Marine Drugs, 2011.

• Holdt SL, Kraan S. “Bioactive compounds in seaweed: functional food applications.” Journal of Applied Phycology, 2011.

• World Health Organization. “Iodine deficiency and nutrition guidelines.” WHO.